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2026 Vol.6, Issue 1 Preview Page

Research Article

Experimental Measurement of Thermophysical Properties of Supercritical Fluids
Seo Yeon Kanga
,
Tae Jong Choia
,
Seok Pil Jangab*
aDepartment of Smart Air Mobility, Korea Aerospace University, Goyang 10540, Korea
bDepartment of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang 10540, Korea
*Corresponding Author
31 May 2026. pp. 45-55
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Abstract

This paper presents the validation of experimentally developed systems and established measurement methodologies for determining the supercritical thermophysical properties of fuels. Experimental systems were developed to measure density, viscosity, and thermal conductivity under supercritical conditions using the constant-volume method, a capillary viscometer, and the transient hot wire method, respectively, within a specialized high-pressure and high-temperature chamber. An uncertainty analysis was conducted for each measurement system. The reliability of the developed systems was validated through experiments performed over a wide range of temperatures and pressures using DI-water and carbon dioxide. The measured density, viscosity, and thermal conductivity showed excellent agreement with reference data from the NIST Chemistry WebBook within uncertainty ranges of ±5.44%, ±7.45%, and ±9.25%, respectively. These results can be applied to the measurement of supercritical thermophysical properties of fuels used for regenerative cooling in high-speed propulsion systems.

Keywords
Supercritical Fluids
Thermophysical Property Measurement
Density
Viscosity
Thermal Conductivity
References
1

EI-Sayed, A. F., Fundamentals of aircraft and rocket propulsion, Springer, London, 2016.

10.1007/978-1-4471-6796-9
2

Luo, S., Xu, D., Song, J., and Liu, J., “A review of regenerative cooling technologies for scramjets,” Applied Thermal Engineering, Vol. 190, 2021, 116754.

10.1016/j.applthermaleng.2021.116754
3

Kim, J. E., Jeong, S. M., Kim, W. D., Choi, J. Y., and Hwang, Y., “Numerical analysis of internal flow thermal environment in an accelerating high-speed vehicle,” Aerospace Science and Technology, Vol. 145, 2024, 108889.

10.1016/j.ast.2024.108889
4

Lu, G., Shi, Z., Zhang, R., Li, Y., and Zhang, K., “Probabilistic design and optimization of thermal protection system with variable thickness based on non-uniform aerodynamic heating,” International Journal of Heat and Mass Transfer, Vol. 225, 2024, 125386.

10.1016/j.ijheatmasstransfer.2024.125386
5

Song, K. D., Choi, S. H., and Scotti, S. J., “Transpiration cooling experiment for scramjet engine combustion chamber by high heat fluxes,” Journal of Propulsion and Power, Vol. 22, No. 1, 2006, pp. 96-102.

10.2514/1.11300
6

Taddeo, L., Gascoin, N., Chetehouna, K., Ingenito, A., Stella, F., Bouchez, M., and Naour, B. L. “Experimental study of pyrolysis-combustion coupling in a regeneratively cooled combustor: Heat transfer and coke formation,” Fuel, Vol. 239, 2019, pp. 1091-1101.

10.1016/j.fuel.2018.11.096
7

Jiang, W., Pan, T., Jiang, G., Sun, Z., Liu, H., Zhou, Z., Ruan, B., Yang, K., and Gao, X., “Data-driven physical fields reconstruction of supercritical-pressure flow in regenerative cooling channel using POD-AE reduced-order model,” International Journal of Heat and Mass Transfer, Vol. 217, 2023, 124699.

10.1016/j.ijheatmasstransfer.2023.124699
8

Kim, J. S., Nam, H., and Kim, K. H., “Development of supercritical heat transfer models for hydrocarbon fuels based on buoyancy: JP-8, JP-10, and n-dodecane,” Fuel, Vol. 397, 2025, 135233.

10.1016/j.fuel.2025.135233
9

Stewart, J., Brezinsky, K., and Glassman, I., “Supercritical pyrolysis of decali, tetralin, and n-decane at 700-800 K: product distribution and reaction mechanism,” Combustion Science and Technology, Vol. 136, No. 1-6, 1998, pp. 373-390.

10.1080/00102209808924178
10

Liu, S., Han, L., Cheng, Q., Wang, P., Zhang, Y., Li, F., and Liu, L., “Thermal performance evaluation of a distributed regenerative cooling system using supercritical catalytic steam reforming of aviation kerosene for scramjet engine,” Energy, Vol. 282, 2023, 129003.

10.1016/j.energy.2023.129003
11

Li, Z., Liu, G., and Zhang, R., “Heat transfer to supercritical hydrocarbon fuel in horizontal tube: Effects of near-wall pyrolysis at high heat flux,” Chemical Engineering Science, Vol. 229, 2021, 115994.

10.1016/j.ces.2020.115994
12

Kim, J. H., Seo, S. H., Lee, M., Kim, H., and Kim, K. H., “Optimal design of regenerative cooling channels for a ram/scramjet dual-mode aircraft using conjugate heat transfer analysis,” Aerospace Science and Technology, Vol. 159, 2025, 109978.

10.1016/j.ast.2025.109978
13

Huber, M. L., Lemmon, E. W., Bell, I. H., and McLinden, M. O., “The NIST REFPROP database for highly accurate properties of industrially important fluids,” Industrial and Engineering Chemistry Research, Vol. 61, No. 42, 2022, 15449-15472.

10.1021/acs.iecr.2c0142736329835PMC9619405
14

Linstrom, P. J., and Mallard, W. G., “NIST Chemistry WebBook, SRD 69,” National Institute of Standards and Technology, Gaithersburg, MD, 2001.

15

Fu, Y., Liu, W., Shi, S., Wang, R., Liu, Y., and Xu, G., “Density measurements of aviation kerosene RP-3 over temperature range from 323 K to 783 K under supercritical pressures from 6 MPa to 8 MPa,” Chinese Journal of Aeronautics, Vol. 38, No. 7, 2025, 103474.

10.1016/j.cja.2025.103474
16

Wang, H., Xu, Z., and Chen, L., “Experimental analysis on density field of supercritical CO2 flow in a converging-diverging channel by fast interferometer technique,” The Journal of Supercritical Fluids, Vol. 230, 2026, 106870.

10.1016/j.supflu.2025.106870
17

Kang, S. Y., Choi, T. J., Park, S. J., Myeong, H. S., Park, S., and Jang, S. P., “Supercritical water-based MWCNT for volumetric solar receivers,” International Journal of Heat and Mass Transfer, Vol. 251, 2025, 127349.

10.1016/j.ijheatmasstransfer.2025.127349
18

Liu, X. Y., Han, Y. C., and Liu, Z. H., “Viscosity of water in the region around the critical point,” The Journal of Supercritical Fluids, Vol. 67, 2012, pp. 132-138.

19

Yang, Z., Liu, Z., Guo, Y., Xiong, W., Shi, Y., and Gong, H., “Viscosity measurements of hydrocarbon fuel at temperatures from (303.2 to 513.2) K and pressures up to 5.1 MPa using a two-capillary viscometer,” Thermochimica Acta, Vol. 617, 2015, pp. 1-7.

10.1016/j.tca.2015.08.005
20

Srinivasan, P. S., Nandapurkar, S. S., and Holland, F. A., “Friction factor for coils,” Transactions of the Institution of Chemical Engineers, Vol. 48, 1970, T156-T161.

21

Yener, M. E., Kashulines, P., Rizvi, S. S. H., and Harriott, P., “Viscosity measurement and modeling of lipid-supercritical carbon dioxide mixtures,” The Journal of Supercritical Fluids, Vol. 11, No. 3, 1998, pp. 151-162.

10.1016/S0896-8446(97)00036-3
22

Lee, S.-H., and Jang, S. P., “Effect of the tilting angle of the wire on the onset of natural convection in the transient hot wire method,” Review of Scientific Instruments, Vol. 83, No. 7, 2012, 076103.

10.1063/1.4731727
Information
  • Publisher :The Korean Society of Propulsion Engineers
  • Publisher(Ko) :한국추진공학회
  • Journal Title :Journal of Propulsion and Energy
  • Journal Title(Ko) :Free Open Access International Journal on Propulsion and Energy Science and Technology
  • Volume : 6
  • No :1
  • Pages :45-55
  • Received Date : 2026-01-31
  • Revised Date : 2026-04-06
  • Accepted Date : 2026-04-20
  • DOI :https://doi.org/10.6108/JPNE.2026.6.1.045
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